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  1. Solve the following system of equations by substitution. Verify the solution.



    Substitute 4 x for y in the first equation.



    You can substitute the known value back into any equation that includes both an x- and a y-value. Choose an equation that is easy to work with.

    The equation «math style=¨font-family:`Times New Roman`¨ xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»y«/mi»«mo»=«/mo»«mn»4«/mn»«mi»x«/mi»«/math» was chosen because it is simpler than Â«math style=¨font-family:`Times New Roman`¨ xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mn»11«/mn»«mi»x«/mi»«mo»+«/mo»«mn»2«/mn»«mi»y«/mi»«mo»=«/mo»«mn»76«/mn»«/math».
    The x -value of the solution is 4. Substitute this value into one of the original equations to determine the y -value.



    The solution is (4,16).
    Verify the solution.